Remove The System Board And The I/O Board Cable - Lenovo ThinkBook 13s Gen 4 Hardware Maintenance Manual

Step 3. Separate the fingerprint board cable from the fingerprint board.
Figure 28. Separate the fingerprint board cable from the fingerprint board
Go to https://support.lenovo.com/partslookup
replacement parts:
Fingerprint board
Fingerprint board cable

Remove the system board and the I/O board cable

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 28
"Remove the battery pack" on page 29
"Remove the solid-state drive (SSD) module" on page 30
"Remove the I/O bracket" on page 31
"Remove the heat sink" on page 35
"Remove the fans" on page 36
Step 1. Peel off the two pieces of tape.
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Hardware Maintenance Manual
to look up the Lenovo part numbers of the following